A company that sells “smart” parking meters and technology used by parking-enforcement agencies in cities around the world was recently the victim of a ransomware attack that also exposed some of its internal files on a website maintained by the hackers responsible.

CivicSmart, a Milwaukee firm that sells parking meters capable of processing mobile payments, hardware and software used in enforcing parking rules and mobile apps used by motorists and government employees alike, was hit last month with a form of ransomware known alternatively as Sodinokibi or REvil.